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[Project: Short_Name='GCTE']

Long Term Experiment No. 2, Soil Organic Matter Network, England

Entry ID:
IACR.No2

Summary

Abstract:
This experiment was initiated in 1965 at a site that has been in arable use for a very long time. The land use in this experiment consists of a cropping sequence: Sugar beet, Spring oats, Winter wheat, with treatments: 3 levels of N, 2 levels of P, 2 levels of K, Na and FYM.

The climatic region of the site is classified as cool temperate. The average climatic conditions at the experimental site ... are:

Time zero soil measurements taken. As far as I am aware samples are taken from each block of the experiment (0-23, 23-60,60-90 cm) are stored. Details of soil sampling method: Auger - When sampled regularly several (6) cores are bulked together for each plot. Soil is separated into layers. Details of measuring depths and soil layers: 0-23 cm: Originally one per rotation (ie 3 years) but now once per two or three rotations, dependent on labour availability. 23-60, 60-90 cm: Some samples on certain treatments in certain years.

c) Soil measurements made and frequency

Total carbon: Once per 2 or 3 rotations Method of measuring total carbon: Dichromate (Walkley/Black) method Total nitrogen: Once per 2 or 3 rotations Method of measuring total nitrogen: Kjeldahl - modified to include nitrate. Total mineral nitrogen: Yearly on certain plots Method of measuring total mineral nitrogen: Extraction with 2M KCl, analysis by Technicon. Soil bulk density or weight: Infrequently Method of measuring soil bulk density or weight: Using "undisturbed" core method. Other nutrients: P, K, Na, Mg - infrequently Atmospheric inputs: On a weekly/monthly basis - see Keith Goulding.

d) Details of the meteorological station

Nearest meteorological station to the site: Broom's Barn which is .4 km from the site at coordinates 0deg34min E, 56deg16min N Meteorological data is available from both a manual and an automatic station.

Description:
This url links to the GCTE-SOMNET home page where additional project information and methodology can be obtained. This site is currently in a datasharing phase of the network where actual data will become available shortly, at different levels of accessibility. Please follow this link for more information.

Details of replication, randomization and controls There are at least 2 replicates in the experiment. The experiment has a randomized plot design. There are control plots described as follows: Treatment A: No inputs; Treatment I: Standard inputs